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Preparation and thermal energy storage studies of CH3COONa·3H2O–KCl composites salt system with enhanced phase change performance

2016; Elsevier BV; Volume: 102; Linguagem: Inglês

10.1016/j.applthermaleng.2016.04.029

1873-5606

Xiang Li, Yuan Zhou, Hongen Nian, Fayan Zhu, Xiufeng Ren, Ouyang Dong, Chunxi Hai, Yue Shen, Jinbo Zeng,

Advanced Thermoelectric Materials and Devices

The phase change performance of the CH3COONa·3H2O–KCl composites salt system with Al2O3 nanoparticles and carboxyl methyl cellulose (CMC) were investigated in this paper. The CH3COONa·3H2O–KCl composite salt system was prepared by adding KCl (at 2, 4, 6, 8, and 10 wt.%) to CH3COONa·3H2O, respectively. Al2O3 nanoparticles were proposed as the nucleating agent and CMC was selected as a thickening agent for the CH3COONa·3H2O–8 wt.%KCl composites salt system. The results show CH3COONa·3H2O–8 wt.%KCl composites salt system with 1 wt.% Al2O3 nanoparticles and 4 wt.% CMC, in which almost no supercoiling phenomenon occurs. After 50 cycles of the melting–freezing cycle test, aluminum oxide is uniformly dispersed in SAT composites matrix, the latent heat remained constant at about 232.29 J/g. The maximum deviations of latent heat of composites CH3COONa·3H2O–8 wt.%KCl with 1 wt.% Al2O3 nanoparticles and 4 wt.% CMC before and after the fifty-run-recycling test are only 3.6%.